Polarization enhancement of microwave absorption by increasing aspect ratio of ellipsoidal nanorattles with Fe3O4 cores and hierarchical CuSiO3 shells

Junjie Xu, Jiwei Liu, Renchao Che*, Chongyun Liang, Maosheng Cao, Yong Li, Zhengwang Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

130 Citations (Scopus)

Abstract

The shape anisotropy of the nanostructured nanorattles is one of the key factors that affect their microwave absorption performance. In the present study, the microwave absorption performance of ellipsoidal Fe3O 4@CuSiO3 nanorattles with different aspect ratios was investigated. Results demonstrated that the ellipsoidal nanorattles with the aspect ratio of 3-4 exhibited about 20% enhancement of microwave absorption intensity compared with spherical Fe3O4@CuSiO3. Generally, as the aspect ratio increased from 2.0 to 3.5, the microwave absorption peak was enhanced monotonously from -20 dB to -30 dB. It was found that the ellipsoidal nanorattles with larger aspect ratio exhibited higher coercivity and double resonance peaks of the real part of complex permittivity, resulting in the improvement of microwave absorption performance. Our research gives insights into the understanding of the anisotropic effect of nanorattles on microwave absorption performance.

Original languageEnglish
Pages (from-to)5782-5790
Number of pages9
JournalNanoscale
Volume6
Issue number11
DOIs
Publication statusPublished - 7 Jun 2014

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